JP6891812B2 - Seat lock device - Google Patents

Description

The present invention relates to a seat lock device that holds a seat back configured to be upright in a locked state.

The seat of the vehicle is equipped with a seat cushion that is the seat surface and a seat back that is the backrest. Of these, the seat back has a standing posture for normal sitting and a sideways posture in which it is tilted forward for convenience of loading. It is possible to switch between elevations. In the standing posture for sitting, the seat lock device provided in the seat back is configured to be held in the locked state and stabilized by engaging with the striker fixed to the vehicle body body. In addition, the standing posture may be switched between two stages by the internal mechanism of the seat lock device.

For example, in the invention described in Patent Document 1, the seat back is locked by engaging the engagement groove of the hook member elastically urged inside the seat lock device with the striker, and the open lever is used. The engagement between the hook member and the striker is released by the operation of.

The seat lock device mounted on the vehicle may be subjected to vibration or impact, but it is desirable that the hook member and the striker are maintained in an engaged state even in such a case. Therefore, in the invention described in Patent Document 1, the protrusion of the hook member engages with the L-shaped groove provided in the open lever to suppress the rotation of the hook member due to vibration or impact.

Further, in the present invention, in the meshing operation process of engaging the striker with the hook member from the unlocked state, the striker abuts on the inclined edge portion of the open lever and rotates in the release direction, and further rotates the hook member in the release direction. I'm letting you.

Japanese Patent No. 4847901

By the way, in the invention described in Patent Document 1 described above, structurally, when the striker enters, it comes into contact with the open lever prior to the hook member, so that it is necessary to form the open lever larger by that amount, which increases the weight. As a result, when the open lever is operated to release the striker from the hook member, the operating load becomes heavy and the operability is inferior.

Further, even if the hook member and the striker are maintained in an engaged state when subjected to vibration or impact, the hook member may rattle within a range of a certain gap, and a small noise may be generated. Depending on the running condition, the sound may continue to be generated.

The present invention has been made in view of the above, and provides a seat lock device capable of improving the operability of disengagement between the hook member and the striker and preventing rattling of the hook member. With the goal.

In order to solve the above-mentioned problems and achieve the object, the present invention includes a hook member elastically rotationally urged in the positive direction and a cam plate elastically rotationally urged in the positive direction. The hook member is provided at the other end with respect to the support shaft in the vicinity of one end, and the hook inclined edge surface that is rotationally urged in the negative direction when the approaching striker comes into contact with the hook member and the approaching striker are said to be said. It has an engaging groove having a depth at which the hook member becomes a lock position by being fitted after getting over the hook inclined edge surface, a restraining pin protruding sideways, and an interlocking pin protruding sideways. The cam plate is in a restricted position that restricts the negative rotation of the hook member when the hook member is engaged with the striker and is in the locked position, and when the striker enters and the striker is disengaged. When the operation is performed, the position is switched to the allowable position, and when the restricted position is reached, the cam surface that abuts on the restraint pin and urges the hook member to rotate in the forward direction, and the hook member from the lock position. It is characterized by having an interlock surface with which the interlock pin comes into contact with the striker before it comes out of the engaging groove when it is rotated in the negative direction.

With such a configuration, the hook member is appropriately pressed by the cam surface of the cam plate to prevent rattling. In addition, even if the hook member rotates slightly due to vibration or impact in an unexpected situation other than when the striker enters and when the striker is disengaged, the interlock is made before the striker comes out of the engagement groove. Further rotation is restricted by the locking surface. The open lever is irrelevant to this interlock mechanism, and the open lever can be formed small and lightweight to improve operability.

It has a sensing lever that is elastically rotationally urged in the positive direction, and the sensing lever is said to have a sensing inclined edge surface that is rotationally urged in the negative direction when the approaching striker abuts, and the sensing lever as viewed from a support shaft. It has a stopper pin on the opposite side of the sensing inclined edge surface, which holds the cam plate in the allowable position by pressing the stopper surface of the cam plate when the striker is in the initial position away from the striker. The cam plate has a relief groove provided between the cam surface and the interlock surface, and the striker enters and abuts on the hook inclined edge surface to rotate the hook member in the negative direction. At that time, the cam plate may be held in the allowable position by the stopper pin so that at least a part of the interlock pin enters the relief groove.

By the action of such a sensing lever, the cam plate is held in the allowable position when the striker enters, the interlock function is disabled so that the interlock pin does not interfere with the interlock surface, and the hook member is squeezed. It can be rotated properly.

In this case, the striker enters and abuts on the sensing inclined edge surface to rotate the sensing lever in the negative direction to separate the stopper pin from the stopper surface and move the cam plate positively from the allowable position. It is preferable to rotate the cam surface in the direction so that the cam surface comes into contact with the restraint pin.

In this case, when the striker enters, it is easy to take the operation timing if it abuts on the hook inclined edge surface and then abuts on the sensing inclined edge surface with a delay.

The sensing lever has a sensing surface at the end of the sensing inclined edge surface, which holds the sensing lever in the sensing position by abutting on the striker when the striker is fitted in the engaging groove. However, there may be a means for transmitting to an external indicator that the sensing lever is in the sensing position. This makes it possible to confirm that the seat back is securely locked.

It has an open lever that is elastically urged to rotate in the negative direction, and the open lever slides the hook release pin provided on the hook member when it is rotated in the positive direction by a force received from the operation unit. The cam plate is pressed while being in contact with the hook release lever that rotates the hook member in the negative direction until the striker is disengaged from the engagement groove, and the cam release pin provided on the cam plate. The interlock pin has a cam release lever surface that rotates the lever in the negative direction to the allowable position, and when the open lever is rotated in the positive direction and the hook member is rotated in the negative direction. The cam plate may be rotated to the allowable position so that at least a part of the cam plate enters the relief groove.

With such an open lever configuration, the interlock function can be disabled so that the interlock pin does not interfere with the interlock surface, and the hook member can be rotated appropriately. In this case, the hook release pin and the interlock pin may be the same pin that is also used.

The open lever is formed continuously from the end of the cam release lever surface, has a cam holding curved surface that holds the cam plate at the allowable position while sliding in contact with the cam release pin, and the open lever is positive. When rotated in the direction, the hook release lever comes into contact with the hook release pin after the cam release lever surface comes into contact with the cam release pin, and the cam plate precedes the hook member. When it is rotated and held in the allowable position, it is easy to take the operation timing.

If the open lever is provided with a regulation pin that regulates the rotation range on the side, the rotation can be regulated easily and appropriately.

The cam plate is viewed along the axial direction of the hook member, is closer to the open lever than the approach locus of the striker, passes through the support shaft of the open lever, and is referred to the vertical line with respect to the approach locus. By providing the hook member on the side of the support shaft, it is possible to make a compact shape without wasting space as a whole.

The striker is a first striker, the first striker is integrally interlocked with a second striker separated by a fixed distance, and the hook member has a free fitting groove between the engaging groove and the support shaft. Then, after the hook member rotates in the negative direction based on the operation of the operator and the first striker comes out of the engaging groove, the first striker further enters and enters the free fitting groove. At the same time, the second striker reaches the inlet portion of the engaging groove, and the hook member returns in the positive direction so that the first striker is loosely fitted into the loose fitting groove and the second striker is loosely fitted into the engaging groove. May be engaged. With this configuration, the standing posture of the seat back can be set in two stages.

According to the seat lock device according to the present invention, the hook member is appropriately pressed by the cam surface of the cam plate to prevent rattling. Further, even if the hook member rotates slightly due to vibration or impact, further rotation is restricted by the interlock surface before the striker comes out of the engaging groove, and the locked state is maintained. Further, the interlock mechanism is irrelevant to the open lever, and the open lever can be formed small and lightweight to improve operability.

FIG. 1 is a schematic view showing a seat to which the seat lock device is applied. FIG. 2 is a perspective view of the hook member. FIG. 3 is a perspective view of the cam plate. FIG. 4 is a perspective view of the sensing lever. FIG. 5 is a perspective view of the open lever. FIG. 6 is a partially omitted side view of the seat lock device. FIG. 7 is a partially omitted perspective view of the seat lock device. FIG. 8-1 is a schematic view showing a first state in the first case in which the hook member rotates. FIG. 8-2 is a schematic view showing a second state in the first case in which the hook member rotates. FIG. 8-3 is a schematic view showing a third state in the first case in which the hook member rotates. FIG. 8-4 is a schematic view showing a fourth state in the first case in which the hook member rotates. FIG. 9-1 is a schematic view showing a first state in the second case in which the hook member rotates. FIG. 9-2 is a schematic view showing a second state in the second case in which the hook member rotates. FIG. 9-3 is a schematic view showing a third state in the second case in which the hook member rotates. FIG. 9-4 is a schematic view showing a fourth state in the second case in which the hook member rotates. FIG. 9-5 is a schematic view showing a fifth state in the second case in which the hook member rotates. FIG. 10 is a schematic view showing a third case in which the hook member rotates.

Hereinafter, examples of the seat lock device according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

As shown in FIG. 1, the seat lock device 10 according to the present embodiment is applied to the seat 12 of the vehicle. The seat 12 includes a seat cushion 12a which is a seat surface and a seat back 12b which is a backrest. Of these, the seat back 12b has a standing posture for normal sitting and a sideways tilting forward for convenience of loading. It is possible to switch between the posture and the elevation. The standing posture can be switched between a standard standing posture and a deeper standing posture (hereinafter referred to as an inclined standing posture) by the internal mechanism of the seat lock device 10. In FIG. 1, the standard standing posture of the seat back 12b is shown by a solid line, and the sideways standing posture and the tilted standing posture are shown by a virtual line.

The seat lock device 10 is provided inside the shoulder portion of the seat back 12b slightly below, and engages with the metal first striker 14a or the second striker 14b fixed to the vehicle body panel side to engage the seat back. 12b can be locked in two standing positions. Further, the seat back 12b can be tilted sideways by disengaging the seat lock device 10 from the first striker 14a and the second striker 14b.

The first striker 14a and the second striker 14b are juxtaposed with a certain distance apart, and the tips are interconnected so that one has a rectangular opening and the opening side is fixed to the striker base 15. Either the first striker 14a or the second striker 14b is typically also referred to as the striker 14.

By lifting the seat back 12b from the sideways posture, the first striker 14a first engages with the seat lock device 10 and becomes the standard standing posture. Next, the engagement between the seat lock device 10 and the first striker 14a is released by pulling up the operation knob (operation unit) 16 provided on the shoulder of the seat back 12b, and the second striker is tilted deeper. The 14b is engaged and locked in the tilted upright position, or returned to the sideways position by tilting forward again. The disengagement in the tilted standing posture is also performed by pulling up the operation knob 16.

Next, before the detailed description of the seat lock device 10, FIGS. 2 to 5 are shown for the four main parts of the seat lock device 10, that is, the hook member 20, the cam plate 50, the sensing lever 70, and the open lever 100. The explanation will be given first with reference to it. Although each component is shown in a perspective view in FIGS. 2 to 5, these are shown in a state viewed from substantially the same direction as in FIG. 6 which is a side view. Further, in the following description, as shown in FIG. 6, when the seat lock device 10 is viewed from one side, the clockwise rotation direction is defined as the positive direction, and the counterclockwise rotation direction is defined as the negative direction. Further, for convenience of explanation, the top, bottom, left, and right are represented based on the state shown in FIG.

The hook member 20 shown in FIG. 2 is a component that holds the seat back 12b in the locked state by engaging with the striker 14, and is elastically urged to rotate in the positive direction in the seat lock device 10.

The hook member 20 is a plate-shaped member, and has a shaft hole 22 provided near one end and a hook inclined edge surface 24 that is rotationally urged in a negative direction when the striker 14 entering from the right abuts. Further, the hook member 20 protrudes laterally to the back of the paper surface with an engaging groove 26 having a depth at which the hook member 20 becomes a lock position when the entering striker 14 gets over the hook inclined edge surface 24 and then fits into the hook member 20. It has a restraining pin 28, an interlock pin 30 projecting laterally at the back of the paper surface, and a free fitting groove 32 provided between the engaging groove 26 and the support shaft.

Further, the hook member 20 has a first corner portion 34 and a second corner portion 36 that project downward on the side opposite to the shaft hole 22. The hook inclined edge surface 24 is formed as an outer surface of the first corner portion 34, and the engaging groove 26 is formed as a space sandwiched between the first corner portion 34 and the second corner portion 36, and is formed as a free fitting groove. 32 is formed between the second corner portion 36 and the shaft hole 22. A gentle bent portion 36a is provided on the left side surface of the engaging groove 26, that is, the right side surface of the second corner portion 36. The hook inclined edge surface 24 is a curved inclined surface that approaches the shaft hole 22 as it goes downward. The engagement groove 26 is a groove in which the opening is slightly wider than the striker 14 and is narrower in the back, and the innermost portion is formed to be slightly narrower than the striker 14. The tip 34a of the first corner portion 34 and the tip 36b of the second corner portion 36 serve as both ends of the opening of the engagement groove 26.

The second corner portion 36 is formed slightly downward longer than the first corner portion 34, and the striker 14 entering from the right hits the lower portion of the second corner portion 36 after getting over the hook inclined edge surface 24. It comes into contact and is guided to the engaging groove 26.

The free fitting groove 32 is a sufficiently wide area in which the first striker 14a is loosely fitted when the second striker 14b engages with the engaging groove 26. In the free fitting groove 32, a bulging portion 38 for giving sufficient strength is provided at a portion where the first striker 14a first contacts, and a buffer hole 38a for shock absorption is provided inside the bulging portion 38. There is.

The restraint pin 28 is a portion pressed by the cam plate 50 in order to prevent the hook member 20 from rattling, and is provided in the vicinity of the shaft hole 22. The interlock pin 30 is a portion that exerts an interlock function that abuts on the cam plate 50 and prevents further rotation when the hook member 20 is rotated in the negative direction by receiving vibration or impact. It is provided at a position farther than the restraint pin 28 when viewed from the hole 22. The hook member 20 is based on a metal plate for ensuring strength, and a resin material covers the periphery thereof.

The cam plate 50 shown in FIG. 3 is a component for a rattling prevention function of the hook member 20 and an interlock function for limiting the rotation of the hook member 20 when it rotates in the negative direction due to vibration or impact. There is, and in the seat lock device 10, it is elastically urged to rotate in the positive direction.

The cam plate 50 is a substantially crab-claw-shaped metal plate-shaped member, and has a shaft hole 52 provided near one end, a cam surface 54, and an interlock surface 56. When the hook member 20 is engaged with the striker 14 and is in the locked position, the cam plate 50 is in a regulated position for restricting the negative rotation of the hook member 20, and when the striker 14 enters and the striker 14 is disengaged. When the operation is performed, the pin retract position (allowable position) is switched.

The cam surface 54 is formed as a part of the lower side and is gently curved as a whole. When the hook member 20 is in the locked position where the hook member 20 is engaged with the striker 14, the cam surface 54 elastically presses the restraint pin 28 to rotationally urge the hook member 20 to rotate in the positive direction, and the hook member 20 is rotated and urged. Prevents 20 rattling.

The interlock surface 56 is formed as a part of the right side, and is a curved inclined surface that moves to the left as it goes downward. The interlock surface 56 has the interlock pin 30 before the striker 14 comes out of the engagement groove 26 when the hook member 20 receives vibration or impact and the restraint pin 28 rotates in the negative direction while pushing the cam surface 54. Contact to regulate rotation.

Further, the cam plate 50 comes into contact with the relief groove 58 provided between the cam surface 54 and the interlock surface 56 and the sensing lever 70 when the seat lock device 10 is not engaged with the striker 14. It has a stopper surface 60, a cam release pin 62 operated by an open lever 100 during a release operation, and a spring engagement hole 64. The shaft hole 52 is provided near one end of the upper side, a cam release pin 62 projects toward the side at the back of the paper surface near the other end, and a spring engagement hole 64 is provided in the middle.

The relief groove 58 is a groove for avoiding interference with the interlock pin 30 when the hook member 20 rotates in the negative direction during normal operation by the operator, and is slightly wider than the interlock pin 30. Yes, it is curved along its motion trajectory.

The stopper surface 60 is formed as an upper side in which a part of the left side bulges in a triangular shape. The stopper surface 60 is pressed and supported by the sensing lever 70 when the seat lock device 10 is not engaged with the striker 14, so that the cam plate 50 is held in the pin retracted position.

The sensing lever 70 shown in FIG. 4 is a long left and right lever member made of a resin material, and is elastically urged to rotate in the positive direction in the seat lock device 10.

The sensing lever 70 includes a shaft hole 72 provided at a substantially center, a substantially cylindrical spring chamber 74 formed around the shaft hole 72, a first arm 76 extending to the right, and a left side. The extending second arm 78, the detection unit 80 provided at the tip of the first arm 76, the stopper pin 82 protruding toward the front side of the paper at the rear end of the second arm 78, and slightly above the stopper pin 82. It has a rod hole 84 formed in. The first arm 76 and the second arm 78 are linearly arranged in opposite directions, and are three-dimensionally reinforced by several ribs, and unnecessary portions are lightened.

The detection unit 80 is provided at a position slightly displaced toward the front side of the paper surface from the tip end portion of the first arm 76, and has a square shape protruding slightly diagonally upward from the first arm 76. The detection unit 80 has a sensing inclined edge surface 86 on the right side and a sensing surface 88 formed on the lower end portion of the sensing inclined edge surface 86. The sensing surface 88 projects slightly below the lower surface of the first arm 76. The sensing inclined edge surface 86 forms a smooth curved surface, and after the striker 14 enters and abuts on the hook inclined edge surface 24 of the hook member 20, it abuts later and is rotationally urged in the negative direction.

The sensing surface 88 holds the sensing lever 70 at the sensing position by contacting the striker 14 when the striker 14 is fitted into the engaging groove 26 of the hook member 20 and is in the locked position. The fact that the sensing lever 70 is held at the sensing position by the sensing surface 88 is transmitted to the external indicator through the rod hole 84 provided on the opposite side. This makes it possible to confirm that the seat back 12b is securely locked.

The stopper pin 82 holds the cam plate 50 in the pin retracted position by pressing the stopper surface 60 of the cam plate 50 at the initial position where the seat lock device 10 is not engaged with the striker 14. .. The sensing lever 70 is in either the initial position or the sensing position in the stationary state.

The open lever 100 shown in FIG. 5 is a component operated from an operation knob 16 (see FIG. 1) to disengage the hook member 20 from the striker 14, and is elastically negative in the seat lock device 10. It is rotationally urged in the direction.

The open lever 100 has a shaft hole 102, a substantially cylindrical spring chamber 104 formed around the shaft hole 102, a cam release action portion 106, a hook release lever 108, and a regulation pin 110.

The cam release action unit 106 is a slightly wide member that protrudes to the left from the lower part of the spring chamber 104 and the upper part of the hook release lever 108, and includes a rod hole 112, a cam release lever surface 114, and a cam holding curved surface 116. Have. The rod hole 112 is a hole provided at a position diagonally downward to the left from the shaft hole 102 and is connected to the operation knob 16. When the rod hole 112 is pulled upward by the operation knob 16, the open lever 100 rotates in the positive direction.

The cam release lever surface 114 is a straight plane in a side view formed as the upper side of the cam release action portion 106. The cam holding curved surface 116 is formed continuously from the left end portion of the cam release lever surface 114, and is a curved surface centered on the shaft hole 102.

When the open lever 100 is rotated in the positive direction under the action of the operation knob 16, the cam release lever surface 114 presses the cam release pin 62 of the cam plate 50 while sliding, and pushes the cam plate 50 to the pin retract position. Rotate in the negative direction until. Further, when the open lever 100 is further rotated in the positive direction, the cam holding curved surface 116 holds the cam plate 50 in the pin retracted position while sliding contact with the cam release pin 62.

The hook release lever 108 extends from the lower part of the spring chamber 104 diagonally downward on the front side of the paper surface. When the open lever 100 is rotated in the positive direction under the action of the operation knob 16, the hook release lever surface 108a, which is the left side surface of the hook release lever 108, is the interlock pin (hook release pin) 30 of the hook member 20. Is pressed while sliding, and the hook member 20 is rotated in the negative direction until the striker 14 comes out of the engaging groove 26. As described above, the interlock pin 30 is a component of the interlock function as a stopper for the striker 14, but also has a function as a hook release pin for releasing the striker 14. The hook release pin may be provided as a dedicated pin separate from the interlock pin 30. The hook release lever 108 and the cam release action portion 106 are three-dimensionally reinforced by some ribs, and unnecessary portions are lightened. The regulation pin 110 is a pin that projects slightly to the right of the shaft hole 102 toward the back of the paper surface and limits the rotation range of the open lever 100.

Next, the configuration of the seat lock device 10 including the hook member 20, the cam plate 50, the sensing lever 70, and the open lever 100 will be described in detail with reference to FIGS. 6 and 7. 6 and 7 show a state in which the seat lock device 10 is engaged with the first striker 14a. FIG. 6 is a side view (a view seen along the axial direction of the hook member) when the seat lock device 10 is viewed from one side, and FIG. 7 is a perspective view seen from a direction substantially opposite to that of FIG. .. Further, when the seat back 12b is in the standard standing posture, the left side of FIG. 6 is the front of the vehicle and the right side is the rear of the vehicle.

In FIG. 6, the cover member 200 on the front side is removed, and in FIG. 7, the base member 202 on the front side is removed to expose the inside of each. The cover member 200 and the base member 202 are provided with striker entry grooves 204a and 204b into which the striker 14 enters, respectively, and are combined and integrated to cover almost the entire interior as a cover and a base of the seat lock device 10. The striker entry grooves 204a and 204b coincide with each other in side view. The cover member 200 and the base member 202 are also attachment members for the seat back 12b of the seat lock device 10, and are provided with attachment holes 206. The cover member 200 and the base member 202 can prevent foreign matter from entering and facilitate attachment to the seat back 12b. The side surface of the base member 202 abuts on a part of the seat back 12b and is fixed.

As shown in FIGS. 6 and 7, the seat lock device 10 is configured based on the cover member 200 and the base member 202, and includes a hook member 20, a cam plate 50, a sensing lever 70, and an open lever 100. Have. Based on FIG. 6, the hook member 20 is in the foreground, the cam plate 50 is in the upper left of the hook member 20, and the open lever 100 and the sensing lever 70 are arranged side by side in the back. .. The open lever 100 and the sensing lever 70 partially overlap each other in a plan view.

The shaft holes 22, 52, 72, and 102 of the hook member 20, the cam plate 50, the sensing lever 70, and the open lever 100 are pivotally supported by the shafts 126, 128, 130, and 132, respectively. The shafts 126, 128, 130, 132 are fixed to the cover member 200 and / or the base member 202.

The shaft 128 and the shaft 132 are arranged substantially horizontally. Further, the two lines from the axis 128 to the axis 126 and the axis 132 are substantially orthogonal to each other. The two lines with the axis 130 as the apex and toward the axis 128 and the axis 126 are substantially orthogonal to each other. The two lines with the axis 130 as the apex and toward the axis 128 and the axis 132 are substantially orthogonal to each other.

Further, when the first striker 14a is engaged with the engagement groove 26, the two lines from the axis 126 as the apex toward the axis 128 and the first striker 14a are substantially orthogonal to each other. At this time, the angle of the two lines toward the first striker 14a and the restraint pin 28 with the axis 126 as the apex is approximately 45 °, and the angle of the two lines toward the first striker 14a and the interlock pin 30 is approximately 30 °. .. At this time, the distance ratio to the first striker 14a, the interlock pin 30, the restraint pin 28, the shaft 128, the shaft 130, and the shaft 132 with respect to the shaft 126 is approximately 7: 5: 2: 6: 4: 8. is there. At this time, the shaft 126, the restraint pin 28, the shaft 130, and the shaft 132 are arranged substantially in a straight line.

The hook member 20 is pivotally supported by the shaft 126, and is elastically urged to rotate in the positive direction by a slightly large torsion spring 134. As shown in FIG. 6, the position of the hook member 20 when the striker 14 is engaged with the engaging groove 26 is set as the lock position. When in the locked position, the first corner portion 34 is substantially displaced to the right side to the maximum extent. Since the hook member 20 is rotationally urged in the forward direction, when the seat lock device 10 is not engaged with the striker 14, the tip 36b of the second corner portion 36 is the bottom surface 201 of the cover member 200 (see FIG. 7). ) Is rotationally displaced until it comes into contact with.

On the other hand, there are three cases in which the hook member 20 rotates in a negative direction from the lock position. The first case is when the striker 14 enters from the right and abuts on the hook inclined edge surface 24 to push up the first corner portion 34 when the seat back 12b is erected from the sideways posture to the standard standing posture. The second case is when the hook release lever 108 pushes up the interlock pin 30 under the action of the open lever 100. The third case is when a large vibration or impact is applied. The first case and the second case are normal operations by the intention of the operator.

The cam plate 50 is pivotally supported by a shaft 128 and elastically urged to rotate in the positive direction by a torsion spring 138. One end of the torsion spring 138 is engaged with the spring engaging hole 64. When the hook member 20 is engaged with the striker 14 and is in the locked position, the cam plate 50 is in a restricted position that restricts the negative rotation of the hook member 20, and the cam surface 54 abuts on the restraint pin 28 and presses. This prevents the hook member 20 from rattling. By preventing the hook member 20 from rattling, there is no abnormal noise and the durability of the parts can be improved. Further, due to the action of the cam surface 54, the hook member 20 does not rotate in the negative direction with some vibration or impact.

When the restraint pin 28 rotates in the negative direction while pushing the cam surface 54 due to the hook member 20 receiving a large vibration or impact, that is, in the third case described above, the striker 14 has the engaging groove 26 as described later. The interlock pin 30 comes into contact with the interlock surface 56 and restricts further rotation before it comes out of the interlock. Further, in the first case and the second case described above, the cam plate 50 is set to the pin retracted position so that the interlock pin 30 does not interfere with the interlock surface 56 and enters the escape groove 58. That is, in the first case, the stopper pin 82 of the sensing lever 70 supports the stopper surface 60 (see FIG. 8-1), and in the second case, the cam release pin 62 is pressed by the cam holding curved surface 116 of the open lever 100. Support it (see Figure 9-3).

Further, as is understood from FIG. 6, the cam plate 50 is on the side of the open lever 100 with respect to the approach locus L1 of the striker 14, and passes through the shaft 132 of the open lever 100 with reference to the perpendicular line L2 with respect to the approach locus L1. It is provided on the side of the shaft 126 of the hook member 20. As a result, it is possible to make a compact shape without wasting space as a whole.

The sensing lever 70 is pivotally supported by a shaft 130 and elastically urged to rotate in the positive direction by a torsion spring 140. When the hook member 20 is in the locked position and the striker 14 is properly engaged with the engaging groove 26, the sensing lever 70 is rotated in a slightly negative direction by abutting the sensing surface 88 on the upper surface thereof. It is held in the sensing position. At this time, the position information is transmitted to the external indicator by the indicator rod (not shown) connected to the rod hole 84 via the adapter 142. That is, the rod hole 84, the adapter 142, and the indicator rod serve as information transmission means. This allows the operator to confirm that the seat back 12b is securely locked.

The open lever 100 is pivotally supported by a shaft 132 and elastically urged to rotate in the negative direction by a torsion spring 144. One end of the torsion spring 144 is engaged with the inner wall of the spring chamber 104, and the other end is engaged with the protrusion 146 of the base member 202. The open lever 100 is rotated in the forward direction by pulling an operating rod (not shown) connected to the rod hole 112 via the adapter 148. The operating rod is connected to the operating knob 16 (see FIG. 1). In addition to the rod, for example, a wire may be connected to the adapters 142 and 148. The regulation pin 110 is fitted in the arc hole 203 provided in the base member 202, and the rotation range of the open lever 100 is limited by the contact between both ends of the arc hole 203 and the regulation pin 110. The regulation pin 110 can easily and appropriately regulate the rotation of the open lever 100.

As can be understood from FIG. 6, the open lever 100 is smaller than the hook member 20, and since a large force is not applied, the open lever 100 can be formed of resin and is lightweight. The open lever 100 is a single-function component for disengaging, and has nothing to do with the interlock function or the like, so that it can be realized in a small size and light weight. Therefore, it is lightly operated by the operation knob 16, and the operability is improved.

Next, the three main operations of the seat lock device 10 configured in this way will be described. The three actions correspond to the three cases described above. That is, when the striker 14 enters and engages, when the engagement groove 26 and the striker 14 are disengaged, and when a large vibration or impact is applied to the hook member 20 and the hook member 20 rotates in the negative direction. ..

The operation in the first case will be described with reference to FIGS. 8-1 to 8-4. That is, it is a case where the striker 14 enters and engages. At this time, the seat back 12b is raised from the sideways posture to the standard standing posture by the operator, and the first striker 14a enters from the right direction when viewed from the seat lock device 10. Further, at this time, the operation of the operation knob 16 is unnecessary, and the direction of the open lever 100 does not change.

In FIGS. 8-1 to 8-4, the hook member 20 and the cam plate 50 are shown by thick lines and the sensing lever 70 is shown by thin lines so that the parts can be easily identified, and the open lever 100 is shown to prevent the drawing from becoming complicated. Is omitted. The angle of the seat lock device 10 is changed by being integrally raised with the seat back 12b. However, in the following description, in order to facilitate understanding, the orientation and position of the seat lock device 10 are fixed and the striker is used. It is assumed that 14 operates relatively.

As shown in FIG. 8-1, when the striker 14 is in the initial state away from the seat lock device 10, the hook member 20, the cam plate 50, and the sensing lever 70 are in the initial positions.

That is, the hook member 20 is urged in the positive direction so that the tip 36b of the second corner portion 36 is rotationally displaced until it comes into contact with the bottom surface 201 of the cover member 200. At this time, the upper portion of the hook inclined edge surface 24 at the first corner portion 34 closes the entrance of the striker entry groove 204b so as to be oblique to the approach locus L1 of the striker 14.

The sensing lever 70 is maximally displaced in the positive direction by being urged in the positive direction. At this time, the first arm 76 descends to the right with respect to the shaft 130, and the substantially intermediate portion of the sensing inclined edge surface 86 is slightly behind the hook inclined edge surface 24 (left side in FIG. 8-1) and has an approach locus. It is arranged so as to be oblique to L1. The second arm 78 moves upward to the left with respect to the shaft 130, and the rod hole 84 is displaced upward. As a result, displacement information is transmitted to the indicator via an indicator rod (not shown), and it can be visually confirmed that the striker 14 is not engaged. Further, the stopper pin 82 is also displaced upward to the maximum, and supports the stopper surface 60 of the cam plate 50.

While the cam plate 50 is urged in the positive direction, the stopper surface 60 is supported by the stopper pin 82 and held in a pin retracted position that is rotated in a slightly negative direction from the maximum displacement position in the positive direction. As a result, the escape groove 58 opens diagonally downward to the right. At this time, the cam surface 54 is slightly separated from the restraint pin 28, and the interlock surface 56 is largely separated from the interlock pin 30.

Then, as shown by the virtual line in FIG. 8-1, when the first striker 14a enters from the right side along the approach locus L1 and approaches the striker entry groove 204b, the first striker 14a is slanted to the upper part of the hook inclined edge surface 24. It abuts and presses the hook member 20 so as to rotate in the negative direction.

As shown in FIG. 8-2, when the first striker 14a further enters the hook member 20 while pressing and rotating in the negative direction while sliding in contact with the hook inclined edge surface 24, the first striker 14a then enters the sensing inclined edge surface 86. Contact diagonally. At this time, a part of the interlock pin 30 is fitted in the vicinity of the upper end of the opening of the relief groove 58. As a result, interference between the interlock pin 30 and the cam plate 50 is avoided. The upper part of the interlock pin 30 may lightly contact the open end of the relief groove 58.

As shown in FIG. 8-3, the first striker 14a further enters the hook member 20 and the sensing lever 70 while pressing and rotating in the negative direction while sliding in contact with the hook inclined edge surface 24 and the sensing inclined edge surface 86. At this time, the stopper pin 82 is displaced downward and separated from the stopper surface 60, but the upper side surface of the escape groove 58 of the cam plate 50 is in contact with the interlock pin 30 and the posture is maintained. The interlock pin 30 can be displaced in the relief groove 58, and the hook member 20 continues to rotate properly in the negative direction.

As shown in FIG. 8-4, when the first striker 14a further enters, it gets over the hook inclined edge surface 24 and the first corner portion 34 and comes into contact with the lower part of the second corner portion 36. Since the second corner portion 36 is set longer than the first corner portion 34, the first striker 14a does not enter the free fitting groove 32 as it is. Further, the first striker 14a gets over the sensing inclined edge surface 86 and comes into contact with the lower surface of the sensing surface 88, and holds the sensing lever 70 at the sensing position.

After that, as shown in FIG. 6, since the hook member 20 is elastically urged, it rotates in the positive direction, and the first striker 14a properly engages with the engaging groove 26. The innermost portion of the engaging groove 26 is slightly narrower than the first striker 14a, and the first striker 14a comes into contact with the engaging groove 26 at two points and is stably engaged. When the hook member 20 rotates in the positive direction, the first striker 14a slides into contact with the right surface of the second corner portion 36, but since the right surface is provided with a gentle bending portion 36a, an appropriate click feeling is obtained. Obtained, and the operator can determine that the proper operation is performed.

When the interlock pin 30 comes out of the relief groove 58, the cam plate 50 also rotates in the positive direction to reach the restricted position, the cam surface 54 appropriately presses the upper surface of the restraint pin 28, and the hook member 20 rattles. Can prevent sticking.

The first striker 14a abuts on the lower surface of the sensing surface 88 to hold the sensing lever 70 at the sensing position, and the rod hole 84 is displaced downward. As a result, the displacement information is transmitted to the indicator via a rod (not shown), and it can be visually confirmed that the first striker 14a is securely engaged.

As described above, in the first case, at least a part of the interlock pin 30 is temporarily escaped by the first striker 14a entering and contacting the hook inclined edge surface 24 and rotating the hook member 20 in the negative direction. Get in. Then, the first striker 14a further enters and abuts on the sensing inclined edge surface 86 to rotate the sensing lever 70 in the negative direction, so that the stopper pin 82 is separated from the stopper surface 60 and the cam plate 50 is moved from the pin retracted position. The cam surface 54 rotates in the positive direction and comes into contact with the restraint pin 28.

Due to the action of the sensing lever 70, the cam plate 50 is held in the pin retracted position when the first striker 14a enters, and an interlock function is provided so that the interlock pin 30 does not interfere with the interlock surface 56. The hook member 20 can be properly rotated by disabling it. Further, since the first striker 14a is brought into contact with the sensing inclined edge surface 86 after being brought into contact with the hook inclined edge surface 24, the cam plate 50 can be held in the pin retracted position and operates. The interlock pin 30 is properly inserted into the relief groove 58 for easy timing.

The relative operation and timing of the hook member 20, the cam plate 50, the interlock pin 30, the stopper pin 82, and the stopper surface 60 do not have to be exactly as described above. For example, in the above, the interlock pin 30 is fitted in the vicinity of the upper end of the opening of the relief groove 58, but may be fitted in the vicinity of the lower end. In the above, the cam plate 50 starts to rotate in the positive direction after the interlock pin 30 is fitted in the relief groove 58, but the interlock pin 30 is slightly fitted in the relief groove 58 within a range where there is no interference. It may start moving. Of course, the operation start timing, operation end timing, operation speed and angle of each part can be adjusted by the length of the arm, the inclination angle of the sliding inclined surface, and the pin position. The lock pin 30 may be inserted into the escape groove 58. This also applies to the second case described below.

Next, the operation in the second case will be described with reference to FIGS. 9-1 to 9-5. That is, when the operator operates the operation knob 16 and the hook release lever 108 pushes up the interlock pin 30 under the action of the open lever 100, the engagement is released. At this time, the seat back 12b is moved from the standard standing posture to the tilted standing posture or returned to the sideways posture by the operator. When viewed from the seat lock device 10, the first striker 14a moves to the loose fitting groove 32, the second striker 14b engages with the engagement groove 26, or the first striker 14a separates to the right.

In FIGS. 9-1 to 9-5, the hook member 20 and the cam plate 50 are shown by thick lines and the open lever 100 is shown by thin lines so that the parts can be easily identified, and the sensing lever 70 is shown in order to prevent the drawing from becoming complicated. Is omitted. When the operator pulls an operation rod (not shown) connected to the rod hole 112 from the state of FIG. 6, the regulation pin 110 is separated from the upper end surface of the arc hole 203 and the open lever 100 starts to rotate in the positive direction. The state shifts to the state shown in FIG. 9-1.

As shown in FIG. 9-1, when the open lever 100 starts to rotate in the negative direction, the cam release lever surface 114 first comes into contact with the lower surface of the cam release pin 62 of the cam plate 50.

As shown in FIG. 9-2, when the open lever 100 further rotates, the cam release lever surface 114 presses and rotates the cam plate 50 in the negative direction while sliding contact with the cam release pin 62. Then, when the cam release pin 62 slides and moves to the vicinity of the end of the cam release lever surface 114, the hook release lever surface 108a on the left side of the hook release lever 108 comes into contact with the right surface of the interlock pin 30. At this time, the cam plate 50 is rotated to some extent and has substantially the same angle as the pin retracting position shown in FIG. 8-2, and the relief groove 58 is opened toward the lower right direction.

As shown in FIG. 9-3, when the open lever 100 further rotates, the cam release pin 62 gets over the cam release lever surface 114 and slides into contact with the cam holding curved surface 116, and the cam plate 50 is held in the pin retracted position. .. Strictly speaking, the pin retracting position of the cam plate 50 at this time may be different from the first case described above, but in the present application, the interlock pin 30 can be avoided by the relief groove 58 for easy understanding. The position is defined as the pin retract position in a broad sense. The hook member 20 further rotates in the negative direction, the interlock pin 30 is inserted into the escape groove 58 without interfering with the cam plate 50, and the first striker 14a is located at the opening of the engagement groove 26. At this time, the angles of the hook member 20 and the cam plate 50 are almost the same as those shown in FIG. 8-4, and the movement of the first striker 14a to the left is restricted by the second corner portion 36, but to the right. You can move freely to. Therefore, at this point, the operator can tilt the seat back 12b forward and return it to the sideways posture.

As shown in FIG. 9-4, when the open lever 100 further rotates, the regulation pin 110 comes into contact with the lower end surface of the arc hole 203 at the maximum displacement position, and further rotation is restricted. At this time, the first striker 14a is completely separated from the engaging groove 26 and can move in either the left or right direction. When moving the seat back 12b from the standard standing posture to the inclined standing posture, the first striker 14a and the second striker 14b are moved to the left along the approach locus L1. As a result, the first striker 14a comes into contact with the bulging portion 38, and the second striker 14b comes into contact with the lower surface of the sensing surface 88. Even if the first striker 14a hits the bulging portion 38 to some extent, the impact is alleviated by the buffer hole 38a.

The cam plate 50 is held in the same pin retracted position as in the state of FIG. 9-3, and does not interfere even if the interlock pin 30 enters considerably deeply.

After that, when the operator stops the pulling operation of the operation knob 16, the open lever 100 elastically rotates in the negative direction and returns to the original position as shown in FIG. 9-5. At this time, the hook member 20, the cam plate 50, and the sensing lever 70 are also returned to the same state as in FIG. That is, in FIGS. 9-5 and 6, only the positions of the first striker 14a and the second striker 14b are different. Even in this state, the cam surface 54 presses the restraint pin 28 to prevent the hook member 20 from rattling. The sensing surface 88 of the sensing lever 70 descends once with the movement of the first striker 14a, but rises again due to the contact of the second striker 14b, and it is detected that the second striker 14b is properly engaged. Liver.

As described above, in the second case, when the open lever 100 is rotated in the positive direction, the hook release lever surface 108a is delayed after the cam release lever surface 114 comes into contact with the cam release pin 62 and the interlock pin. Contact 30. The cam plate 50 rotates ahead of the hook member 20 and is held in the pin retracted position, and when the hook member 20 rotates, at least a part of the interlock pin 30 once enters the escape groove 58. With such a configuration of the open lever 100, the cam plate 50 is rotated in advance of the hook member 20 to be held in the pin retracted position at the time of disengagement, and the interlock pin 30 interferes with the interlock surface 56. The interlock function can be disabled so that the hook member 20 can be rotated appropriately.

Further, since the cam plate 50 is held in the pin retracted position in advance of the hook member 20, it is easy to take the operation timing, and the interlock pin 30 is properly inserted into the escape groove 58. Further, even if the rotation range of the open lever 100 is large, the cam plate 50 is properly held at the pin retracted position by the cam holding curved surface 116.

Next, the operation in the third case will be described with reference to FIG. That is, regardless of the intention of the operator, the hook member 20 receives a large vibration or impact and rotates in the negative direction. At this time, the seat back 12b is in a standard standing posture or an inclined standing posture, and it is desirable that the striker 14 and the engaging groove 26 are not inadvertently disengaged by vibration or impact. In FIG. 10, the sensing lever 70 and the open lever 100 are omitted in order to prevent the drawing from becoming complicated. The hook member 20 and the cam plate 50 shown by the virtual line in FIG. 10 are the same as those shown in FIG. 6, and the striker 14 is engaged with the engaging groove 26. At this time, even if a small vibration or impact is received, the restraint pin 28 is pressed by the cam surface 54, so that the hook member 20 is prevented from rattling and does not rotate in the negative direction.

As shown in FIG. 10, when the hook member 20 receives a large vibration or impact, the restraint pin 28 may rotate slightly in the negative direction while pushing the cam surface 54. At this time, unlike the first case and the second case described above, the cam plate 50 is not in the pin retracted position, and the interlock pin 30 comes into contact with the interlock surface 56 without being fitted into the escape groove 58. Become. Then, before the striker 14 comes out of the engaging groove 26, the interlock pin 30 comes into contact with the interlock surface 56 at the contact point P, and further rotation is restricted.

That is, when the hook member 20 is in the normal lock position, the cam surface 54 elastically suppresses the rotation in the negative direction, and the interlock surface 56 reliably blocks the hook member 20 so that the striker 14 can be pressed. It does not come off from the engagement groove 26. The open lever 100 is irrelevant to this interlock mechanism, and the open lever 100 can be formed small and lightweight to improve operability.

Further, at the contact point P, the impact force applied to the cam plate 50 is set to face the forward rotation of the cam plate 50 depending on the contact direction of the interlock pin 30 and the inclination angle of the interlock surface 56. , The cam plate 50 does not rotate in the negative direction any more, and the hook member 20 can be reliably stopped. When the vibration or impact is stopped, the hook member 20 rotates in the positive direction due to the elastic force and returns to the state indicated by the virtual line.

As described above, according to the seat lock device 10 according to the present embodiment, it is possible to improve the operability of disengagement between the hook member 20 and the striker 14 and prevent the hook member 20 from rattling. .. In addition, the four main parts are properly linked while sharing functions. That is, the hook member 20 is an engaging function of the striker 14, the cam plate 50 is an operation suppressing function of the hook member 20, and the sensing lever 70 holds the position detecting function of the striker 14 and the cam plate 50 at the pin retracted position. As a function, the open lever 100 is a release function of the striker 14. Due to such division of functions, each component has a simple and lightweight configuration without waste. In particular, since the open lever 100 is made compact and lightweight, the operation feeling of the operation knob 16 becomes light. In addition, the overall weight of the seat lock device 10 is also reduced. The seat lock device 10 is a two-stage lock mechanism, but the actions of the cam plate 50, the sensing lever 70, the open lever 100, and the like are also effective for the one-stage lock mechanism.

The present invention is not limited to the above-described embodiment, and it goes without saying that the present invention can be freely modified without departing from the gist of the present invention.

10 Seat lock device, 12 seats, 12a seat cushion, 12b seat back, 14, 14a, 14b striker, 16 operation knob,
20 Hook member, 22, 52, 72, 102 Shaft hole, 24 Hook inclined edge surface, 26 Engagement groove, 28 Restraint pin, 30 Interlock pin (hook release pin), 32 Free fitting groove, 34 First corner, 34a, 36b tip, 36
2nd corner, 36a bend, 50 cam plate, 54 cam surface, 56 interlock surface, 58 relief groove, 60 stopper surface, 62 cam release pin, 70 sensing lever, 74,104 spring chamber, 76 1st arm, 78 2nd arm, 80 detection part, 82 stopper pin, 84,112 rod hole, 86 sensing inclined edge surface, 88 sensing surface, 100 open lever, 106 cam release action part, 108 hook release lever, 108a hook release lever surface, 110 regulation pin, 114 cam release lever surface,
116 cam holding curved surface, 126,128,130,132 axes, 134,138,140,144 torsion spring, 142,148 adapter, 200 cover member, 201 bottom surface, 202 base member, 203 arc hole,
204a, 204b Striker entry groove, 206 mounting hole, L1 approach locus, L2 vertical line.

Claims (10)

A hook member that is elastically urged to rotate in the positive direction,
A cam plate elastically urged to rotate in the positive direction,
Have,
The hook member is provided at the other end with respect to the support shaft in the vicinity of one end, and has a hook inclined edge surface that is rotationally urged in a negative direction when an approaching striker comes into contact with the hook member.
An engaging groove having a depth at which the hook member becomes a lock position when the striker that enters is fitted after getting over the hook inclined edge surface.
With a restraint pin protruding to the side,
With an interlock pin protruding to the side,
Have,
The cam plate is in a restricted position that restricts the negative rotation of the hook member when the hook member is engaged with the striker and is in the locked position, and when the striker enters and the striker is disengaged. When the operation is performed, the hook member is switched to an allowable position that allows the hook member to rotate in the negative direction.
A cam surface that abuts on the restraint pin and rotationally urges the hook member in the positive direction when it is in the restricted position.
When the hook member rotates in the negative direction from the lock position, the interlock surface with which the interlock pin comes into contact before the striker comes out of the engagement groove.
A seat lock device characterized by having. In the seat lock device according to claim 1,
It has a sensing lever that is elastically urged to rotate in the positive direction.
The sensing lever has a sensing inclined edge surface that is rotationally urged in a negative direction when the striker that enters is in contact with the striker.
A stopper pin that holds the cam plate in the allowable position by pressing the stopper surface of the cam plate at the initial position where the striker is separated from the sensing inclined edge surface when viewed from the support shaft. ,
Have,
The cam plate has a relief groove provided between the cam surface and the interlock surface.
When the striker enters and abuts on the hook inclined edge surface to rotate the hook member in the negative direction, the cam is provided by the stopper pin so that at least a part of the interlock pin enters the escape groove. A seat lock device characterized by holding the plate in the permissible position. In the seat lock device according to claim 2,
The striker enters and abuts on the sensing inclined edge surface to rotate the sensing lever in the negative direction to separate the stopper pin from the stopper surface and rotate the cam plate in the positive direction from the allowable position. A seat lock device that is moved to bring the cam surface into contact with the restraint pin. In the seat lock device according to claim 2 or 3.
A seat lock device, characterized in that, when the striker enters, it abuts on the hook inclined edge surface and then abuts on the sensing inclined edge surface with a delay. In the seat lock device according to any one of claims 2 to 4.
The sensing lever has a sensing surface at the end of the sensing inclined edge surface, which holds the sensing lever in the sensing position by contacting the striker when the striker is fitted in the engaging groove. And
A seat lock device comprising means for transmitting to an external indicator that the sensing lever is in the sensing position. In the seat lock device according to any one of claims 2 to 5.
It has an open lever that is elastically urged to rotate in the negative direction.
When the open lever is rotated in the positive direction by a force received from the operating portion, the hook release pin provided on the hook member is pressed while sliding, and the hook is pulled out from the engaging groove until the striker is disengaged from the engaging groove. A hook release lever that rotates the member in the negative direction,
A cam release lever surface that presses the cam release pin provided on the cam plate while sliding to rotate the cam plate in the negative direction to the allowable position, and a cam release lever surface.
Have,
When the open lever is rotated in the positive direction and the hook member is rotated in the negative direction, the cam plate is rotated to the allowable position so that at least a part of the interlock pin enters the relief groove. A seat lock device characterized by being moved. In the seat lock device according to claim 6,
The open lever is formed continuously from the end of the cam release lever surface, and has a cam holding curved surface that holds the cam plate in the allowable position while sliding contact with the cam release pin.
When the open lever is rotated in the forward direction, the hook release lever abuts on the hook release pin after the cam release lever surface abuts on the cam release pin, and the cam plate abuts on the hook. A seat lock device that rotates ahead of a member and is held in the allowable position. In the seat lock device according to claim 6,
The open lever is a seat lock device characterized by having a regulation pin for restricting a rotation range on the side. In the seat lock device according to claim 6,
The cam plate is viewed along the axial direction of the hook member, is closer to the open lever than the approach locus of the striker, passes through the support shaft of the open lever, and is referred to the vertical line with respect to the approach locus. A seat lock device provided on the side of a support shaft of a hook member. In the seat lock device according to any one of claims 1 to 9.
The striker is a first striker, and the first striker integrally interlocks with a second striker separated by a fixed distance.
The hook member has a free fitting groove between the engaging groove and the support shaft.
After the hook member rotates in the negative direction based on the operation of the operator and the first striker comes out of the engaging groove, the first striker further enters the loose fitting groove and enters the free fitting groove. The second striker reaches the inlet of the engaging groove, and the hook member returns in the positive direction so that the first striker is loosely fitted into the loose fitting groove and the second striker is engaged with the engaging groove. A seat lock device characterized by

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